Py-tlsh

<PRE>
26/March/2020
version 4: adding version identifier to each digest: 'T1'
turing on T1 functionality by setting showvers=1 in main
updating regression tests to have T1 at the start of digests
</PRE>

<PRE>
26/March/2020
version 4: adding version identifier to each digest: 'T1'
adding command line option -old to generate old style digests
In this version - the showvers is defaulted to off - so this will pass the old regression tests
</PRE>

<PRE>
25/March/2020
in test.sh and testlen.sh - make TLSH_PROG a variable
</PRE>

<PRE>
24/March/2020
preperation for Windows build
- remove ../Testing/ from test.sh script and from regression test results
</PRE>

<PRE>
24/March/2020
resolve issue 72 - remove tlsh_version
</PRE>

<PRE>
24/March/2020
add checking to confirm that TLSH digests are the correct length in
-c option
-d option
the appropriate column of -l listfile options
</PRE>